Stop motion for textile apparatus



July 6, 1937.

w.J. SCTT 2,086,096

STOP` MOTION FOR TEXTILE APPARATUS Filed Jan. 9, 1956 2 Sheets-Sheet l l llllllldllllllllllllllll,1'lill/11011111110 L` JNVENTOR.

ATTORNEYS.

W. J. SCOTT STOP MOTION FOR TEXTILE APPARATUS July 6, 1937.

Filed Jan. 9, 1936 2 Sheets-Sheet 2 INVENTOR.

h/f//e/ Jaffa/2 BY ATTORNEYS.

Patented July 6, 1937 Unirse STATES e were ortica Vare STOP :MOTION FOR TEXTILE APPARATUS` Walter J. Scott, Woonsocket, R. I. Application Januaryrv 9, 1936, Serial No. 58,290

13 Claims.

Another object of the invention is the provision of a stop motion which may be nicely adjusted so as to position the same at the desired location with reference to the travel of the yarn.

A further object of the invention is the proviv sion of a stop motion which will act as a check to prevent improper tension on the yarn.

With these and other objects in view, the invention consists of certain novel features of con-V struction, as will be more fully described, and particularly pointed out in the appended claims. In the accompanying drawings: i

Fig. 1 is a front elevation of a fragmental portion of a drawing frame with my stop motion mounted thereon; Fig. 2 is a sectional View through the structure shown in Figure 1; Y j

Fig. 3 is a sectional view on a larger scale of the stop motion and its mounting bracket; Fig. 4 is a sectional view substantially on line 1 4 of Figure 3, and showing in dotted lines-the active position of the rockable actuating member in contacting position;

Fig. 5 is a diagrammatic'viewillustratingthe Y electrical hookup for the'stopping of the drawing frame;

Fig, 6 is a front elevation of a modified arrangement of my electrical connections .and feeler member and also a modicationwith respect to the drawing frame upon which the same is mounted; v Y l v Fig. 7 is a sectional View centrally Ythrough the supporting bracket shown in Figure 6.

In the drafting of wool the yarn frequently breaks between the delivery draft rolls and the ilier by means of which the same is packaged on a bobbin, and should a break occur of one of the ends in the frame, it is desirable'thatthe frame be stopped until the broken ends arey pieced together. I accordingly mount a stop V() motion on the frame adjacent the upper end of the ier so that should breakage occur'between the draft rolls and the flier the frame willrbe stopped until the yarn ends are spliced together .and proper tension placed on the yarn; f and I have so constructed my vstop motion thatit does' not depend on the use of springs'nor is it materially influenced by diierent conditions under which it operates and thus is more positive in' Y its operation than some other Stop motions withY fwhich I am familiar; and the followingris a more 5' Ydetailed description of the present embodiment of my invention, illustrating the preferred means by which these advantageous results may beY ac-Y complished.

With reference to thedrawings, lll and Il re- 10 d present a pair of nip rolls which receive the yarn l2 from the receiving rolls i3 and i4. Av pair. of delivery nip rolls l5 and I5 nip the yarn at l1 and draft or attenuate the yarn between this nip'i'l and nip i8 of the rolls lil and Il.i 15

Carrier rolls i5 and 2t also 2l and 22 are positioned between the pointsv of the nipsgbut are not weighted and therefore have no drafting actionupon the yarn. After drafting', the yarn nowY designated 23 passes into the top of the ier 24 20 emerging from the opening 25 and passing through guide 26 and alongand about the arm 21 thence'tbrough the guide 28 and onto the bobbin `2lwhich rotates upon the spindle andis f suitablyrtraversed'for thelaying of the yarnr23 25 axially along lits extent. Y

The flier bearing 2li is supported in theV rail 3l and upon this rail YI have rmounted a bracket 32 by means of a Vbolt 33, On this' bracket I have' supported a U-shaped member 34whichis held V3") in position `by a bolt 35 located inand through the Y slot 36 along .which it may be adjusted to pos. y tion .the U-shaped support`34 as desired along its extentafter which the head of the bolt 35 may Y be tightened to hold the samein place. l Airockable contact andjfeeler member 31 is pivotally mounted in the U-snaped support by means of a pair of bolts 3B having conical ends 39vto it within the correspondingly shaped recesses 40 in the rockable member 31 for pivotally, 40 mounting the `rockable member therein. These bolts 38 are held in position byjam nuts 4l engaging the sides of the U-shaped member 34. A

weight Vl2 is adjustably positioned on the member 31 Yand heldin position by a lock screw 43 and 45 tends to swing the opposite feeler end M of the member 31 upwardly and into engagement withV the travelling yarn between .therniprrli andits 'point of entrance Yinto the hub of the flier. Thev Y engagement of the member 31 with the yarn pre- 50 vents the weight 42 from swinging the member to its fullest extent and the arrangement is such that in operation the rockable member 31 .when

it engages the properly tensioned yarrr-V will Vremainin substantiallyihQrZOIlialP9-$t0nl I'UWH 55,

be observed that the feeler member also exerts a tension on the yarn, which may be nicely adjusted.

Should the yarn break, or become slack to such an extent as to detrimentally affect the operation of the machine on the work, the rockable member 3l will swing into the dotted line position as shown in Figure 4, in which position its portion M on the feeler side of the pivot will be engaged and limited in its movement by the contact plate 45 which is insulated from the U-shaped support 34 by means of suitable insulated washers 45 and suitable insulation 4'! about the holding screws 48 so as to complete the circuit an-d operate the stopping mechanism at some remote point of the machine.

For the electric circuit, I use one side of the machine as a ground while a live wire 49 is connected to the plate 45 insulated from the rest of the machine. A reference to Figure 5 shows a live wire 59 connected to the contact plate 55, while the machine will act as a ground to complete the circuit. In Figure 5, I illustrate a wire 50 leading to the transformer 5I to show this completion of the circuit. The transformer is connected to the line wires 52 and 53.

As the circuit is closed by the rockable member 31 engaging the contact plate 65, a magnet f 54 is energized to cause a release of the latch 55 on the arm 56 carried by a lever 51 so as to permit the spring 58 to swing the lever 5l to the left in Figure 6 and move the rod 59 to cause a belt shifter' 60 to shift the. belt from the fast pulley 6l to the loose pulley 62 and thus remove the driving power from the drawing frame to permit it to stop.

In Figure 6, I have shown a gill box type of Y drawing frame with a vertical apron 55 about the upper of the front delivery rolls 66. As the yarn 61 is delivered from the rolls 5B and 58 it extends over the rockably mounted feeler and contact member 59 and thence to the flier 24, as previously set forth. This member 69 is pivoted as at 1U having an adjustable weight 1I tending to swing the member 69 upwardly. A pivot mounting 'l2 is adjustable by means of the posts 'I3 in a socket M held in position by a set screw 15. At the contact end of the member 69 a portion 'I6 is raised for engagement with the resilient spring member Tl mounted on the contact plate I8 to which the live wire 'i9 is connected. This spring is sufficiently resilient so as to permit movement of the spring to follow thek feeler arm during any vibration which may be caused of the rockable member 69 so that contact will be had for a-suf cient length of time to cause the stop motion to act.

Where several of the ends are drafted side by side a single contact plate such as 18 may serve for two rockable members, as shown in Figure 6, where they extend in opposite directions from their pivots as is clearly shown. Also, this arrangement permits of a horizontal mounting of the feeler member which in some instances has its advantages for quicker action of the feeler arm should the yarn break.

The foregoing description is directed solely towards the construction illustrated, but I desire it to be understood that I reserve the privilege of resorting to all the mechanical changes to which the device is susceptible, the invention being defined and limited only by the terms of the appended claims. 1

I claim:

1.` In an electric stop motion for drawing frames, a set of draft rolls, packaging means for the yarn, an electric circuit, a rockable feeler member in said circuit located intermediate said draft rolls and packaging means, said member being pivotally mounted at one side of the yarn and having an elongated nger extending transversely across the direction of travel of a stretch of yarn and laterally of the plane in which the yarn lies, the body of said nger beingv convex and positioned to engage the under side of the traveling yarn whereby the latter in passing thereover is caused to bear against a substantial arc of the circumference of the finger, an electrical contact arranged on the end portion of said finger and at the opposite side of the yarn from the pivotal mounting for the lever, a weight for urging sai-d nger upwardly into engagement with the under side of the yarn, and a iixed contact in a position on the other side of the yarn to be engaged by the contact on said rockable member to close the circuit and stop the machine upon breakage of the. yarn.

2. In an electric stop motion for drawing frames, a set of draft rolls, packaging means for the yarn, an electric circuit, a rockable feeler member in said circuit located intermediate between sai-d draft rolls and packaging means, said member provided at one end with an electrical contact and having an elongated finger disposed under and extending transversely across the direction of travel of a stretch of yarn and laterally of the plane in which the yarn lies, the body of said nger being convex and positioned to engage one side of the traveling yarn whereby the latter in passing thereover is caused to bear against a substantial arc of the circumference of the finger, a weight at the other end portion of said feeler member for urging said nger into engagement lwith the yarn, and a fixed contact member arranged in a position on the other side of the yarn as the weight to be engaged by the contact on said rockable member to close the circuit and stop the machine upon breakage of the yarn.

3. In an electric stop motion for drawing frames, a set of .draft rolls, packaging means for the yarn, an electric circuit, a rockable feeler member in said circuit located intermediate between said draft rolls and packaging means, said member comprising arod provided at one end with an electrical contact and extending transversely across the direction of travel of a stretch of yarn and laterally of the plane in which the yarn lies, the body of said rod being positioned to engage one side of the. traveling yarn whereby the latter in passing thereover is caused to bear against a substantial arc of the circumference of the rod, a weight at the other end portion of said feeler member for urging said rod into engagement with the yarn, and a fixed Contact member arranged in a position on the other si-de of the yarn as the weight to be engaged by the Contact on said rockable member to close the circuit and stop the machine upon breakage of the yarn. Y Y

4. In an electric stop. motion for textile machinery, a rockable contact feeler member adapted to normally engage a stretch of traveling yarn and having an intermediate portion extending across the line of travel of the latter and an electrical contact on the free end portion thereof, means for swingably mounting and vsupporting said member, means for urging said member into Contact with the underside of the traveling yarn Vtotension the same, said member being limited the work, an electric circuit, a xed contact member at one side of the yarn, a rockable feeler member extending laterally of the travel of the. work and carrying a contact arranged on the same side of the yarn as the iixed contact for engagement with said xed contact on occurrence of breakage of the work, said feeler member being positioned to engage the work between said drafting and packaging means and to exert a predetermined tension on the work yet be blocked thereby from circuit closing engagement with said xed contact when the work is properly tensioned, and means for urging said rockable member towards said fixed contact member.

6. In an electric stop motion for textile machinery, a rockable feeler member adapted to normally engage a stretch of traveling yarn and having an electrical contact on an end portion, a pivot for said rockable member located intermediate of the ends of the latter, means on one side of said pivot for urging the yarn engaging portion of the member in the opposite direction on the other side of the pivot and move it laterally towards the yarn and into engagement with the underside thereof to properly tension said traveling yarn to be limited only by the engaged yarn from further rocking movement, an electric circuit, and a fixed contact on the opposite side of said yarn as the weight and in a position to be engaged by said rockable contact member should the yarn break or slacken a predetermined amount to close the circuit and stop the machine.

'7. In an electric stop motion for textile machinery, a rockable feeler member provided with an electrical contact on an end portion, said feeler member being adapted to normally engage a stretch of traveling yarn and positioned below, and at substantially right angles of the travelV of the yarn, a pivot for said rockable member located intermediate of its ends, a weight on one portion of said member disposed from one side of said pivot for urging the yarn engaging portion of said member in an opposite generally upwardly direction on the other side of the pivot and moveV it into engagement with and exert a predeter- Y mined tension on said traveling yarn to be restrained from further rocking movement by the engaged yarn, an electric circuit, and a xed contact on the opposite side of said yarn as the weight and in a position to be engaged by said rockable contact member should the yarn break or slacken a predetermined amount to close the circuit and stop the machine.

8. In an electric stop motion'for textile machinery, a rockable contact feeler member adapted to normally engage the underside of a stretch i of traveling yarn, a bracket for pivotally mounting said rockable member, means for adjusting said pivot in said bracket, a weight adjustably mounted on said member for urging the same into engagement with one side ofthe traveling yarn and to exert a tension thereon, said member being limited in its swinging movement upon engagement thereby, a fixed contact member on the opposite side of said yarn as the weight, and anV passes and a free end portion electric circuit including machine stopping means closed by contact of said rockable member with said fixed contact to stopv the machine.

9. In an electric stop motion for textile machinery, a xed electrical contactjmember positioned at one side of a moving stretch of yarn, an electric circuit, a feeler member electrically connected therewith andcomprising an upwardly swingable arm normally arranged to extend transversely across the line of travel of the moving yarn, said feeler member having an intermediate portion over which the moving yarn adjacent to said xed contact member and adapted to engage the latter upon abnormal run or" breakage of the yarn to close said electric circuit, pivot means for swingably mounting and supporting said arm, said pivot means being positioned on the other side of the yarn from said xed contact and located between the yarn and the adjacent end of the arm, and means adjacent to said pivot means and acting on said arm to urge the same into engagement with the underside of the yarn to tension the latter and also cause the arm to swing upwardly so that its free end will contact with said xed contact member to close the electric circuit and stop the machine upon breakage of the yarn.

10. In an electric stop motion for textile machinery, a fixed electrical contact member positioned at one side of a moving stretch of yarn, an electric circuit, a feeler member electrically connected therewith and comprising an upwardly swingable arm normally arranged to extend transversely across the line of travel of the moving yarn, said feeler member having an intern mediate portion over which the moving yarn passes and a free end portion adjacent to said fixed contact member and adapted to engage the latter upon breakage of the yarn to close said electric circuit, pivot means for swingably mounting and supporting said arm, said pivot means being positioned on the other side of the yarn from said xed contact and located between the yarn and the adjacent end of the arm, and a weight adjacent to said pivot means and acting on said arm to urge the saine into engagement with the underside of the yarn to tension the latter and also cause the arm to swing upwardly run of the yarn, the pivot axis of said bar extending in adirection substantially parallel to the normal run of the yarn between the nip rolls and the packaging means, and means controlled by the movement of said bar upon abnormal run or failure of the yarn to stop the operation of the f t machine.

l2. In a textile machine, in combination, a pair of delivery nip rolls, a flier, supporting structure, a rockable feeler bar pivoted on said structure and positioned between the pair of nip rolls and the topof the flier and restrained from movement by the normal run of the yarn, said bar extending transversely across the line of travel of the moving yarnand providing an intermediate portion over which the yarn passes with aV relative traversing movement, the pivot axis of 'said bar extending in a direction parallel to the normal run of the yarn between the nip rolls and the flier, and means controlled by the movement of said bar to stop the operation of the machine upon abnormal run or failure of the yarn.

13. An electric stop motion device for textile machinery comprising a support, a xed electrical contact member thereon, and a rockable feeler bar over which Athe moving yarn passes, said bar being pivotally mounted on said support, the pivot axis of said bar being inclined from the horizontal and adapted to extend parallel with the normal run of the moving yarn as it passes over the bar, and means tending to swing the bar against the yarn.

WALTER J. SCOTT. 

